TYLin is a globally recognized, full-service infrastructure consulting firm committed to providing innovative, cost-effective, constructible designs for the global infrastructure market. With over 3,000 employees throughout the Americas, Asia, and Europe, the firm provides support on projects of varying size and complexity. Together, we enhance conventional designs with smarter, more resilient systems. We provide people with better mobility. We steward precious resources by finding more sustainable solutions. Job Summary TYLin’s Rail + Transit team is growing, and we’re looking for a Senior Mechanical Project Engineer who is passionate about mechanical design, not construction management. If you love solving complex engineering challenges and designing high-performance HVAC and ventilation systems for urban transit environments, this is your opportunity to help shape the future of rail infrastructure. Responsibilities & Qualifications What You’ll Do Lead mechanical design for stations, tunnels, and transit facilities - including HVAC, tunnel ventilation, and supporting systems. Develop contract drawings, specifications, and technical reports for design packages. Perform engineering calculations and system modeling to drive efficiency, safety, and sustainability. Ensure designs meet NFPA, ASHRAE, and local code requirements. Collaborate with architects, structural, and electrical engineers to deliver fully integrated designs. Support design reviews, QA/QC, and technical guidance throughout project delivery. What You Bring Bachelor’s degree in Mechanical Engineering. 10+ years of mechanical design experience for rail, transit, or complex building systems. Expertise in HVAC and tunnel ventilation design. Proven ability to produce high-quality design deliverables. Working knowledge of relevant codes and engineering standards. Strong technical judgment, creativity, and problem-solving mindset. Clear communicator who thrives in a collaborative, multidisciplinary team. Why Join TYLin? At TYLin, you’ll work on signature rail and transit projects that enhance mobility and transform communities. You'll join a collaborative team of specialists who value innovation, technical excellence, and real-world impact. We offer competitive benefits, professional growth, and the chance to work on projects you’ll be proud of. Design with purpose. Build what’s next. Join TYLin. Additional Information TYLin is committed to pay equity. As part of that commitment, we have provided the base compensation range of $100,000 - $170,000 annually for this position and local market. We recognize that each candidate brings a unique set of skills, experience, education and competencies to the table that will be reflected in our offer. TYLin is proud to offer exciting career development opportunities. #LI-Hybrid TYLin offers a comprehensive total rewards package. Our benefits may include extensive medical, disability and life insurance coverage, continuing education benefits, paid time off, employee assistance program and a retirement savings plan with company matching contributions. We encourage all candidates to explore our total rewards offering. TYLin is an equal opportunity employer, and we prohibit discrimination and harassment of any type as protected by federal, provincial, state or local laws. We celebrate diversity and are committed to creating an inclusive environment for all employees. The company and its employees are required to comply with all local health authority, legal or lawful client requirements. Our Global Infrastructure team, including TYLin, Introba, Landrum & Brown form the Infrastructure division of Sidara. Sidara is a leading, privately-owned professional services group with a diverse history and a global presence. Sidara world-class planning, design, engineering, and project management firms are dedicated to achieving our clients’ ambitions and supporting sustainable communities worldwide. The Global Infrastructure division is comprised of 5,000 people operating in 21 countries.